background: url(http://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Icons-mini-file_acrobat.gif/15px-Icons-mini-file_acrobat.gif) center right no-repeat;
+
background: url(http://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Icons-mini-file_acrobat.gif/60px-Icons-mini-file_acrobat.gif) center right / 15px 15px no-repeat;